Two killer whales have been found dead in an Alaskan river.
Killer whales have sometimes been seen near where the river meets the ocean but never that far up stream.
A team of vets and a whale specialist are going to examine the carcasses to figure out exactly what killed them.
They believe it was a combination of the cold and stress from being in fresh water for too long. Poor whales.
The Alaska Department of Fish and Game is looking into how, if more whales are found up river, to safely return them to salt water.
[Image via AP Images.]